Add GLSL keywords for overriding functions

[libs/gl.git] / shaderlib / phong.glsl

diff --git a/shaderlib/phong.glsl b/shaderlib/phong.glsl
index 56fa68c7767e1264d2a170baa4931e69ae8c0482..f9d8d1e72b971827401575a567fc7ba38f3943a9 100644 (file)
--- a/shaderlib/phong.glsl
+++ b/shaderlib/phong.glsl
@@ -14,7 +14,7 @@ layout(constant_id=auto) const bool use_sky = false;
 layout(constant_id=auto) const bool use_fog = false;
 
 #pragma MSP stage(fragment)
-vec4 get_diffuse_color()
+virtual vec4 get_diffuse_color()
 {
        if(use_diffuse_map)
                return texture(diffuse_map, texcoord.xy);
@@ -22,7 +22,7 @@ vec4 get_diffuse_color()
                return basic_material.diffuse;
 }
 
-vec3 get_specular_color()
+virtual vec3 get_specular_color()
 {
        if(use_specular_map)
                return texture(specular_map, texcoord.xy).rgb;
@@ -30,7 +30,7 @@ vec3 get_specular_color()
                return basic_material.specular.rgb;
 }
 
-float get_shininess_value()
+virtual float get_shininess_value()
 {
        if(use_shininess_map)
                return texture(shininess_map, texcoord.xy).r*255.0;
@@ -38,7 +38,7 @@ float get_shininess_value()
                return basic_material.shininess;
 }
 
-vec3 get_emission_color()
+virtual vec3 get_emission_color()
 {
        if(use_emission_map)
                return texture(emission_map, texcoord.xy).rgb;
@@ -46,7 +46,7 @@ vec3 get_emission_color()
                return basic_material.emission.rgb;
 }
 
-float get_reflectivity_value()
+virtual float get_reflectivity_value()
 {
        if(use_reflectivity_map)
                return texture(reflectivity_map, texcoord.xy).r;